gistfile1.txt

   WC_DEPTH is this path's depth as reported by set_path/link_path.
   REQUESTED_DEPTH is derived from the depth set by
   svn_repos_begin_report().

   When iterating over this directory's entries, the following tables
   describe what happens for all possible combinations
   of WC_DEPTH/REQUESTED_DEPTH (rows represent WC_DEPTH, columns
   represent REQUESTED_DEPTH):

   Legend:
     X: ignore this entry (it's either below the requested depth, or
        if the requested depth is svn_depth_unknown, below the working
        copy depth)
     o: handle this entry normally
     U: handle the entry as if it were a newly added repository path
        (the client is upgrading to a deeper wc and doesn't currently
        have this entry, but it should be there after the upgrade, so we
        need to send the whole thing, not just deltas)

                              For files:
   ______________________________________________________________
   | req. depth| unknown | empty | files | immediates | infinity |
   |wc. depth  |         |       |       |            |          |
   |___________|_________|_______|_______|____________|__________|
   |empty      |    X    |   X   |   U   |     U      |    U     |
   |___________|_________|_______|_______|____________|__________|
   |files      |    o    |   X   |   o   |     o      |    o     |
   |___________|_________|_______|_______|____________|__________|
   |immediates |    o    |   X   |   o   |     o      |    o     |
   |___________|_________|_______|_______|____________|__________|
   |infinity   |    o    |   X   |   o   |     o      |    o     |
   |___________|_________|_______|_______|____________|__________|

                            For directories:
   ______________________________________________________________
   | req. depth| unknown | empty | files | immediates | infinity |
   |wc. depth  |         |       |       |            |          |
   |___________|_________|_______|_______|____________|__________|
   |empty      |    X    |   X   |   X   |     U      |    U     |
   |___________|_________|_______|_______|____________|__________|
   |files      |    X    |   X   |   X   |     U      |    U     |
   |___________|_________|_______|_______|____________|__________|
   |immediates |    o    |   X   |   X   |     o      |    o     |
   |___________|_________|_______|_______|____________|__________|
   |infinity   |    o    |   X   |   X   |     o      |    o     |
   |___________|_________|_______|_______|____________|__________|